1st solution: 9L 11% Vinegar, 9, 11
2nd solution: 10L 69% Vinegar 10, 69
Total volume when mixed = 9 + 10 = 19
Using, law of mixtures:
Volume1 * Concentration 1 + Volume2 * Concentration2 = Total Volume * Final Concentration
Volume is in L, and Concentration is in %
9*11 + 10*69 = 19* FC, Where FC = Final Concentration
99 + 690 = 19FC
789 = 19FC Divide both sides by 19
789/19 = FC
41.52 = FC
Therefore final concentration after mixing = 41.52%
